Orbital selectivity of layer-resolved tunneling in the iron-based superconductor Ba0.6K0.4Fe2As2
J.-X. Yin, X.-X. Wu, Jian Li, Zheng Wu, J.-H. Wang, C.-S. Ting, P.-H. Hor, X. J. Liang, C. L. Zhang, P. C. Dai, X. C. Wang, C. Q. Jin, G. F. Chen, J. P. Hu, Z.-Q. Wang, Ang Li, H. Ding, S. H. Pan
DOI 10.1103/PhysRevB.102.054515 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We use scanning tunneling microscopy/spectroscopy to elucidate the Cooper pairing of the iron pnictide superconductor Ba0.6K0.4Fe2As2. By a cold-cleaving technique, we obtain atomically resolved termination surfaces with different layer identities. Remarkably, we observe that the low-energy tunneling spectrum related to superconductivity has an unprecedented dependence on the layer identity. By cross referencing with the angle-revolved photoemission results and the tunneling data of LiFeAs, we find that tunneling on each termination surface probes superconductivity through selecting distinct Fe−3d orbitals. These findings imply the real-space orbital features of the Cooper pairing in the iron pnictide superconductors, and propose a general concept that, for complex multiorbital material, tunneling on different terminating layers can feature orbital selectivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
| LiFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17.5 | Pressure not reported | unknown |
Similar papers
Orbital selectivity of layer resolved tunneling on iron superconductor Ba0.6K0.4Fe2As2
similarity 1.00J. -X. Yin et al. · 2016 · arXiv:1602.04949
Source status unknown — claims are unverified
Spin fluctuations and superconductivity in a three-dimensional tight-binding model for BaFe2As2
similarity 0.95S. Graser et al.
Source status unknown — claims are unverified
Vortex-glass phase transition and superconductivity in an underdoped (Ba,K)Fe2As2 single crystal
similarity 0.94Hyeong-Jin Kim et al.
Source status unknown — claims are unverified
Towards a quantitative description of tunneling conductance of superconductors: Application to LiFeAs
similarity 0.94A. Kreisel et al.
Source status unknown — claims are unverified
Density-functional calculations of the electronic structures and magnetism of the pnictide superconductors BaFeAs2 and BaFeSb2
similarity 0.94J. H. Shim et al.
Source status unknown — claims are unverified
Crossover from weak to strong pairing in unconventional superconductors
similarity 0.94D. S. Inosov et al.
Source status unknown — claims are unverified